JPH0723637A - Lift control sensitivity adjusting device for planting section in rice transplanter - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to lift control of a rice planting device, and an object thereof is to prevent deep planting at the start of seedling planting work. [Structure] A float 26 is provided, which is in contact with the surface soil surface of the paddy field in the field and glides under a part of the load of the planting part, and moves up and down with respect to the machine frame side in response to fluctuations in ground contact pressure. -When the float 26 moves upward beyond a certain range to approach the machine frame side, the machine frame side is controlled to rise, and conversely, the float 26 moves downward beyond the certain range to move away from the machine frame side. Occasionally, in a rice transplanter in which the raising / lowering control mechanism 14 is configured to control the lowering of the machine frame side, a lift control sensitivity adjusting device 34 is provided for changing and adjusting the drag force against the direction in which the float 26 is pushed up by the surface soil surface of the paddy field. A lift control sensitivity adjusting device for a planting section in a rice transplanter, wherein the sensitivity adjusting device 34 is provided so as to be maintained at the sensitivity side sensitivity adjustment setting within a predetermined section at the beginning of planting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift control sensitivity adjusting device for rice transplanters.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. -14,014, the surface of a paddy field in a field is contacted with a part of a load of a planting section and glides, and the machine frame side receives a change in ground pressure. A float that moves up and down is provided, and when this float moves upwards beyond a certain range to approach the machine frame side, the machine frame side is controlled to rise, and conversely, the float is within a certain range. A rice transplanter with a lifting control mechanism configured to control the lowering of the machine frame side when moving down over and over the machine frame side is well known, and moreover, the sensitivity of the lift control of the lifting control mechanism is determined by the mud on the surface of the paddy field. There was a thing to adjust according to the hardness of the surface.

[0003]

In the above-mentioned prior art, the state of the field is simply detected, and the lift control that matches this is executed. However, in such a control adjustment, when the seedling planting is in a stopped state at the initial stage, buoyancy due to the propulsion speed on the float side does not occur, so that the field hard / soft detection accuracy is poor and erroneous lift control is performed. Generally, there was a drawback that the depth of seedling planting became deep.

[0004]

The present invention takes the following technical means in order to solve the above-mentioned problems. That is, a float 26 is provided which is in contact with the surface soil surface of the paddy field in the field and glides under a part of the load of the planting part, and moves up and down with respect to the machine frame side in response to the fluctuation of the ground contact pressure. When the vehicle 26 moves upwards beyond a certain range to approach the machine casing side, the machine casing side is controlled to rise, and conversely, when the float 26 moves downward beyond a certain range to move away from the machine casing side. In the rice transplanter in which the raising / lowering control mechanism 14 is configured to control the lowering of the machine frame side, a lift control sensitivity adjusting device 34 is provided for changing and adjusting the drag force against the direction in which the float 26 is pushed up on the surface soil surface of the paddy field. The adjusting device 34 is a lift control sensitivity adjusting device of a planting section in a rice transplanter, which is provided so as to be maintained at the sensitivity side sensitivity adjustment setting within a predetermined section at the beginning of planting.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, a riding type rice transplanter will be described in detail as an example. However, of course, those in which the body side is lift-controlled by walking type wheel lifts are also included. 1
Is a passenger-type tow vehicle, and is a vehicle body 4 equipped with a pair of left and right steering driving wheels 2 and 2 and a pair of left and right driving rear wheels 3 and 3.
A prime mover 5 is attached to the front and rear intermediate portions of the vehicle, and a front mission case 6 is provided on the lower front side of the vehicle body. Reference numeral 7 denotes a steering wheel, which is provided on an upper portion of a steering frame 9 which is erected on the front left and right center portions of a boarding floor 8 provided on the vehicle body, so that the front wheels can be steered.

Reference numeral 10 is a control seat, which is a cover of the prime mover 5.
The boarding floor 8 is supported on the upper part of the cover body which is inflated upward so as to double as the above. Reference numeral 11 denotes a link mechanism for connecting a rice transplanter 12 to be described later so as to be able to move up and down, and a rear end side of a lower link rod 11b similar to an upper link rod 11a whose base is pivotally mounted on a column 13 standing on the vehicle body 4 side. Is vertically connected by a vertical link body 11c.

Reference numeral 14 is a hydraulic cylinder device which is an example of a lifting operation mechanism, in which the cylinder 14a side is attached to the vehicle body 4 side and the piston 14b side is connected to a lever 15 which is integral with the upper link rod 11a. Reference numeral 16 is a hydraulic pump, 17 is a tank, 18 is a relief valve, and 19 is a hydraulic switching valve described later.

The rice planting device 12 is provided with a seedling table 22 on the upper side of the planting transmission case 20, and an extension planting drive case 21 extending rearward from the case 20 and a seedling planting tool 23. The planted rotating case 24 provided is attached. Reference numeral 25 denotes a support frame that supports the seedling table 22 so as to be movable laterally, and has a gate-shaped rear view, and the left and right lower end sides are fixed to the planting transmission case 20.

Reference numeral 26 is a grounding float, and three grounding floats are provided side by side at a predetermined interval on the central portion and both the left and right sides. Each of the floats 26a, 26b, 26c is pivotally connected at its rear side to an arm 28 attached to the case 21 so as to be vertically rotatable by an electric cylinder device 27, and at its front portion. It is attached to a protruding frame 29 attached to 20 via a link 30 so as to be able to move up and down.

The front portion of the planting transmission case 20 of the rice planting device 12 is pivotally connected to the vertical link body 11c so as to be rotatable left and right. 31 is the rolling axis. Three
Reference numeral 2 is a drive shaft that transmits the rice transplanter 12 side. In the hydraulic pressure switching valve 19, the valve main body side 19a is pivotally connected to the upper link member 30a of the link 30 which is mounted on the front side of the central portion float 26a so as to be able to move up and down, and the rod 19b integral with the valve body is provided.
Is connected to the float 26a. Therefore, the flow
When the front side of the door 26a is pushed up to a certain level or more, the piston 14b of the hydraulic cylinder device 14 protrudes and is switched to lift the rice transplanting device 12 through the link mechanism 11, and conversely, the front side of the float 26a is fixed. When the hydraulic cylinder-device 14 is lowered as described above, the piston 14b of the hydraulic cylinder device 14 is retracted so that the rice planting device 12 is lowered via the link mechanism 11.

Reference numeral 33 is an attachment for attaching the rear portion of the float.
This is an interlocking member that interlocks the frame 28 and the link 30 to which the front side is attached. When the arm 28 is operated to adjust the seedling planting depth, the entire float changes the angle of attack in parallel. The hydraulic switching valve 19 is configured to be operated vertically without being operated, and to prevent the hydraulic switching valve 19 from being switched indiscriminately even if the depth of seedling planting is adjusted.

Reference numeral 34 denotes a sensitivity adjusting electric cylinder, which is an example of a lift control sensitivity adjusting device.
34 is interposed in the intermediate portion of the interlocking member 33. That is, by reducing the length of the interlocking member 33, the flow can be reduced.
Of the hydraulic switching valve 19 that lifts the rice transplanter 12 by adjusting the front portion of the toe 26a to a downward position in the direction of the arrow (a) so that the float 26a can easily catch the buoyancy of the paddy field during traveling. The switching sensitivity can be made sensitive, and conversely, by extending the length of the interlocking member 33, the sensitivity can be adjusted to the insensitive side.

The operation control of the sensitivity adjusting electric cylinder-34 is constructed as the control circuit of FIG. That is,
When the signal of the switch SW1 for detecting the "engagement" operation of the clutch lever 35 for "engaging" and "disengaging" the planting clutch is transmitted to the central processing unit 36, an output signal is transmitted to the sensitivity adjustment control unit 36, and this From control unit to electric cylinder-3
4, the piston is retracted to shorten the length of the interlocking member 33, and the switching sensitivity of the hydraulic pressure switching valve 19 is adjusted to the sensitive side. At the same time, the timer-38 is operated to restore the original time when the time is up. The configuration is such that it can be reset to restore the sensitivity adjustment state.
It should be noted that the timer-38 is configured so that the time can be freely set, and a timer-setting dial 39 may be provided on the upper surface of the control frame 9 so that the operator can set the time.

Explaining the operation of the above example, the seedling planting work is carried out as shown in the flowchart of FIG. That is, the prime mover 5 is started and the rice transplanter is placed in the paddy field to enter the start state. Then, the rice transplanter 12, which is a planting unit, is lowered. The lowering operation is configured such that the lever 35 shares the switching lever of the hydraulic pressure switching valve 19 so that the lowering operation is performed by operating the planted clutch lever 35. The state of FIG. 1 is a state in which the rice transplanter is "down" and the clutch is "disengaged".

From this state, the lever 35 is operated to the front side to operate the clutch to "engage". Then switch SW
1 is switched on and the signal is transmitted to the CPU. Then, an output signal is transmitted from the CPU to the sensitivity adjustment control unit 37, the electric cylinder 34 is operated, the piston is retracted, the length of the interlocking member 33 is shortened, and the link 26 is moved to the float 26a. Lower the front side. That is, the lift sensitivity of the rice transplanter 12 is compensated for on the sensitive side. Further, the timer-38 starts counting at the same time as the "ON" signal of the clutch, and when a predetermined set time is reached, the electric cylinder-34 operates in the opposite manner to restore the original normal set sensitivity.

As described above, since the sensitivity is controlled to the sensitive side at the start of the seedling planting work, the situation where the seedling planting work is started with the float largely submerged in the mud of the paddy field is eliminated. Therefore, the situation of deeply planting seedlings does not occur. Next, in order to carry out straight-lined planting and turn it near the ridges and turn it back, the clutch lever 35 is rotated rearward to turn the planting clutch “disengaged” and further rotated to further plant rice. When the device 12 is lifted and U-turned, and the rice planting device 12 is lowered again to operate the clutch to "engage", the sensitivity becomes sensitive for a predetermined time in the same stroke as the previous start, and then Then, after returning to normal operation, normal planting work will be carried out.

Next, another embodiment will be described in detail. Fifth
As shown in FIG. 6 and FIG. 6, a vehicle body horizontal sensor 40 is provided on the vehicle body side of the towing vehicle 1 to detect the inclination of the vehicle body in the front-rear direction.
40, the detection switch SW2 is turned on to send a signal to the central processing unit 36, and from the central processing unit 36 to the sensitivity adjustment control unit 37 so as to automatically adjust the sensitivity of lift control of the rice transplant apparatus 12 to the sensitive side. It is transmitted and the electric cylinder-34 is driven for control. In this case, the timer control is unnecessary, and the sensitivity is automatically returned to the original state when the inclination is restored. It is also possible to automatically adjust the sensitivity of the impression according to the degree of inclination, and in this case, it can be dealt with by transmitting a voltage or current according to the inclination of the vehicle body side to the central processing unit 36 as a signal. Is. As an example of detecting the longitudinal inclination of the vehicle body, the pendulum type sensor can always detect the angle in that state, but the liquid horizontal sensors 40a, 40b,
For example, in the case of the type in which the inclination is detected by the flow of mercury in the container, it may not be possible to detect it. To prevent this, as shown in FIG. It can be solved by attaching two pieces to the front.

A shift lever for shifting the working speed shown in FIG.
In 41, when the seedling planting speed is changed to a high speed, this is detected by the detection switch SW3 and a signal is sent to the central processing unit 36 to automatically adjust the sensitivity of lift control of the rice planting device 12 to the sensitive side. The data is transmitted from the processing unit 36 to the sensitivity adjustment control unit 37, and the electric cylinder 34 is driven to perform control. When the work speed is increased by the throttle lever 42, the sensitivity can be automatically adjusted according to the magnitude of the output signal.

Each of the above-described embodiments may be either a special single control mode or an overall composite control, or
These selection controls can be freely selected. When the sensitivity for controlling the lift of the rice transplanter 12 is set to the insensitive side, the surface of the paddy field is hard to some extent and the float is not buried in the mud. In such a case, the sensitivity is adjusted by the sensitivity adjusting dial 43 shown in FIG. 5, and the sensitivity is set to the insensitive side of the float posture in which the front side of the float 26 becomes higher. Even when the sensitivity is set to the insensitive side, the sensitivity of lift control of the rice transplanter 12 is executed by each of the embodiments of the technical means described above. In this case, further, With this sensitivity control to the insensitive side,
As shown in FIG. 8, a hydraulic cylinder-a hydraulic circuit to the device 14 side is provided with a variable relief valve 44 so that the electric cylinder-
When the sensitivity is controlled to the insensitive side by the drive by 34, the variable relief valve 44 is operated at the same time, and the oil passage to the cylinder side is throttled so as to slow down the lift speed of the rice transplanter 12,
If a large amount of oil is returned to the tank 17 side, the leveling performance can be improved and the effect can be enhanced.

Further, as another embodiment, as shown in FIG.
Along with the sensitivity control to the lift insensitive side, the float 26
Leveling performance will be improved by adjusting the levitation resistance of the to maximize. That is, when the sensitivity is controlled to the insensitive side by driving by the electric cylinder-34, the front side of the float may be strongly pressed by the spring 45 at the same time. In the figure, reference numeral 46 is a body wire which connects the electric cylinder 34 and the spring 45 connected to the link 30. The operation of the electric cylinder-27 for adjusting the planting depth is performed by push button switches a, b, and c.
It is convenient to provide it on the side surface of 0.

[0021]

According to the present invention, when the seedling planting work is started from the stopped state, even if the work is started from the state where the float is buried in the soft surface soil of the paddy field, the lift of the rice planting device is still in the initial stage. Since the control sensitivity is adjusted to the sensitive side, the planting accuracy can be improved because the planting depth will not be deep planting at the start of the work.

[Brief description of drawings]

1] Side view

[Fig. 2] Hydraulic circuit diagram

FIG. 3 is a block control circuit diagram.

[Fig. 4] Flow chart

FIG. 5 is a block control circuit diagram of another example.

FIG. 6 is a back cross-sectional view of the main part of another example.

FIG. 7 is a side view of the main part of another example.

FIG. 8 is a hydraulic circuit diagram of another example.

FIG. 9 is a side view of the main part of another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Towing vehicle 12 Rice transplanter 14 Lifting control mechanism 26 Float 34 Lift control sensitivity adjusting device

Claims (1)

[Claims] 1. A float 26 is provided which is in contact with the surface soil surface of a paddy field in a field and glides under a part of the load of a planting part, and which moves up and down with respect to a machine frame side in response to a change in ground pressure. This float 2
When 6 moves upwards beyond a certain range to approach the machine frame side, the machine frame side is controlled to rise, and conversely, when the float 26 moves downward beyond a certain range to move away from the machine frame side. In the rice transplanter in which the raising / lowering control mechanism 14 is configured to control the lowering of the frame side, a lift control sensitivity adjusting device 34 for changing and adjusting the drag force against the direction in which the float 26 is pushed up by the surface soil surface of the paddy field is provided. Device 34
Is a lift control sensitivity adjusting device for a planting section in a rice transplanter, which is provided so as to maintain the sensitivity side sensitivity adjustment setting within a predetermined section at the beginning of planting.